13220132321 has 4 divisors (see below), whose sum is σ = 14421962544. Its totient is φ = 12018302100.

The previous prime is 13220132309. The next prime is 13220132329. The reversal of 13220132321 is 12323102231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12323102231 = 11 ⋅1120282021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13220132321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13220132293 and 13220132302.

It is not an unprimeable number, because it can be changed into a prime (13220132329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600915095 + ... + 600915116.

It is an arithmetic number, because the mean of its divisors is an integer number (3605490636).

Almost surely, 2^13220132321 is an apocalyptic number.

13220132321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13220132321 is a deficient number, since it is larger than the sum of its proper divisors (1201830223).

13220132321 is a wasteful number, since it uses less digits than its factorization.

13220132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201830222.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13220132321 its reverse (12323102231), we get a palindrome (25543234552).

It can be divided in two parts, 13220 and 132321, that added together give a palindrome (145541).

The spelling of 13220132321 in words is "thirteen billion, two hundred twenty million, one hundred thirty-two thousand, three hundred twenty-one".